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# Copyright 2000-2010 Michael Hudson-Doyle <micahel@gmail.com>
# Armin Rigo
#
# All Rights Reserved
#
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose is hereby granted without fee,
# provided that the above copyright notice appear in all copies and
# that both that copyright notice and this permission notice appear in
# supporting documentation.
#
# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
"""This is an alternative to python_reader which tries to emulate
the CPython prompt as closely as possible, with the exception of
allowing multiline input and multiline history entries.
"""
from __future__ import annotations
import _colorize # type: ignore[import-not-found]
import _sitebuiltins
import linecache
import sys
import code
import ast
from types import ModuleType
from .readline import _get_reader, multiline_input
_error: tuple[type[Exception], ...] | type[Exception]
try:
from .unix_console import _error
except ModuleNotFoundError:
from .windows_console import _error
def check() -> str:
"""Returns the error message if there is a problem initializing the state."""
try:
_get_reader()
except _error as e:
return str(e) or repr(e) or "unknown error"
return ""
def _strip_final_indent(text: str) -> str:
# kill spaces and tabs at the end, but only if they follow '\n'.
# meant to remove the auto-indentation only (although it would of
# course also remove explicitly-added indentation).
short = text.rstrip(" \t")
n = len(short)
if n > 0 and text[n - 1] == "\n":
return short
return text
def _clear_screen():
reader = _get_reader()
reader.scheduled_commands.append("clear_screen")
REPL_COMMANDS = {
"exit": _sitebuiltins.Quitter('exit', ''),
"quit": _sitebuiltins.Quitter('quit' ,''),
"copyright": _sitebuiltins._Printer('copyright', sys.copyright),
"help": "help",
"clear": _clear_screen,
}
class InteractiveColoredConsole(code.InteractiveConsole):
def __init__(
self,
locals: dict[str, object] | None = None,
filename: str = "<console>",
*,
local_exit: bool = False,
) -> None:
super().__init__(locals=locals, filename=filename, local_exit=local_exit) # type: ignore[call-arg]
self.can_colorize = _colorize.can_colorize()
def showsyntaxerror(self, filename=None):
super().showsyntaxerror(colorize=self.can_colorize)
def showtraceback(self):
super().showtraceback(colorize=self.can_colorize)
def runsource(self, source, filename="<input>", symbol="single"):
try:
tree = ast.parse(source)
except (OverflowError, SyntaxError, ValueError):
self.showsyntaxerror(filename)
return False
if tree.body:
*_, last_stmt = tree.body
for stmt in tree.body:
wrapper = ast.Interactive if stmt is last_stmt else ast.Module
the_symbol = symbol if stmt is last_stmt else "exec"
item = wrapper([stmt])
try:
code = compile(item, filename, the_symbol, dont_inherit=True)
except (OverflowError, ValueError, SyntaxError):
self.showsyntaxerror(filename)
return False
if code is None:
return True
self.runcode(code)
return False
def run_multiline_interactive_console(
mainmodule: ModuleType | None= None, future_flags: int = 0
) -> None:
import __main__
from .readline import _setup
_setup()
mainmodule = mainmodule or __main__
console = InteractiveColoredConsole(mainmodule.__dict__, filename="<stdin>")
if future_flags:
console.compile.compiler.flags |= future_flags
input_n = 0
def maybe_run_command(statement: str) -> bool:
statement = statement.strip()
if statement in console.locals or statement not in REPL_COMMANDS:
return False
reader = _get_reader()
reader.history.pop() # skip internal commands in history
command = REPL_COMMANDS[statement]
if callable(command):
command()
return True
if isinstance(command, str):
# Internal readline commands require a prepared reader like
# inside multiline_input.
reader.prepare()
reader.refresh()
reader.do_cmd((command, [statement]))
reader.restore()
return True
return False
def more_lines(unicodetext: str) -> bool:
# ooh, look at the hack:
src = _strip_final_indent(unicodetext)
try:
code = console.compile(src, "<stdin>", "single")
except (OverflowError, SyntaxError, ValueError):
return False
else:
return code is None
while 1:
try:
try:
sys.stdout.flush()
except Exception:
pass
ps1 = getattr(sys, "ps1", ">>> ")
ps2 = getattr(sys, "ps2", "... ")
try:
statement = multiline_input(more_lines, ps1, ps2)
except EOFError:
break
if maybe_run_command(statement):
continue
input_name = f"<python-input-{input_n}>"
linecache._register_code(input_name, statement, "<stdin>") # type: ignore[attr-defined]
more = console.push(_strip_final_indent(statement), filename=input_name, _symbol="single") # type: ignore[call-arg]
assert not more
input_n += 1
except KeyboardInterrupt:
console.write("\nKeyboardInterrupt\n")
console.resetbuffer()
except MemoryError:
console.write("\nMemoryError\n")
console.resetbuffer()
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